111 lines
2.4 KiB
JavaScript
111 lines
2.4 KiB
JavaScript
/**
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* 从 vant/lib/index.css 生成 WXSS 兼容样式：去掉含 * / *= 的选择器规则。
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* 升级 vant 后执行：node scripts/gen-vant-mp-safe-css.js
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*/
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const fs = require('fs')
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const path = require('path')
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const root = path.join(__dirname, '..')
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const src = path.join(root, 'node_modules', 'vant', 'lib', 'index.css')
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const dest = path.join(root, 'styles', 'vant-mp-safe.css')
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if (!fs.existsSync(src)) {
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console.error('[gen-vant-mp-safe-css] missing', src)
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process.exit(1)
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}
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const text = fs.readFileSync(src, 'utf8')
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const out = []
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let i = 0
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const n = text.length
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let removed = 0
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let kept = 0
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function isBadSelector(sel) {
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// universal selector `*` (not `*=` attr or content "*")
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if (/(^|[,)\s>+~])\*(?!=)/.test(sel)) return true
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if (sel.includes('*=')) return true
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return false
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}
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while (i < n) {
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if (text.startsWith('/*', i)) {
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const j = text.indexOf('*/', i + 2)
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if (j < 0) break
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out.push(text.slice(i, j + 2))
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i = j + 2
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continue
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}
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if (/\s/.test(text[i])) {
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out.push(text[i])
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i += 1
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continue
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}
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if (text[i] === '@') {
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const brace = text.indexOf('{', i)
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const semi = text.indexOf(';', i)
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if (semi !== -1 && (brace === -1 || semi < brace)) {
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out.push(text.slice(i, semi + 1))
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i = semi + 1
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continue
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}
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if (brace < 0) {
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out.push(text.slice(i))
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break
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}
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let depth = 0
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let j = brace
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while (j < n) {
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if (text[j] === '{') depth += 1
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else if (text[j] === '}') {
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depth -= 1
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if (depth === 0) {
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j += 1
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break
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}
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}
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j += 1
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}
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const block = text.slice(i, j)
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if (isBadSelector(block)) removed += 1
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else {
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out.push(block)
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kept += 1
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}
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i = j
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continue
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}
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const brace = text.indexOf('{', i)
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if (brace < 0) {
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out.push(text.slice(i))
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break
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}
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let depth = 0
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let j = brace
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while (j < n) {
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if (text[j] === '{') depth += 1
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else if (text[j] === '}') {
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depth -= 1
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if (depth === 0) {
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j += 1
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break
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}
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}
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j += 1
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}
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const sel = text.slice(i, brace)
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const rule = text.slice(i, j)
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if (isBadSelector(sel)) removed += 1
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else {
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out.push(rule)
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kept += 1
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}
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i = j
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}
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const header =
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'/* auto-generated from vant/lib/index.css — WXSS-safe (no * / *= selectors). Do not edit. */\n'
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fs.writeFileSync(dest, header + out.join(''))
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console.log('[gen-vant-mp-safe-css] kept=%s removed=%s -> %s', kept, removed, dest)
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